using System;

namespace Solution {
    class Solution {
        static void Main(string[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT */
        float diferencia,promedio=0, X = 0;
        double Y = 0, Z;
            int N = Convert.ToInt32(Console.ReadLine());
            string [] cadena = Console.ReadLine().Split(' ');
            float [] enteros = new float[N];
            for (int i=0; i<enteros.Length; i++) {
                enteros[i] = Convert.ToInt32(cadena[i]);
                X += enteros[i];
                Y += Math.Pow(enteros[i],2);
                //Y += enteros[i]*enteros[i];
                promedio = X / N;
                if (enteros[i] > promedio){
                    for(int i = 0 ; i < N ;i++)
                    Console.Write("{0} ",enteros[i]);
                }
            } 
            Z = X/(Math.Pow(Y,3));
                for (int k=0; k < N;k++) {
                    for (int i=0; i < N-1; i++) {
                        if (enteros[i] > enteros[i+1]) {
                            float enteroAux = enteros[i];
                            enteros[i]=enteros[i+1];
                            enteros[i+1]=enteroAux;
                        }
                    }  
                }
            diferencia = enteros[N-1] - enteros[0];
            Console.WriteLine("\n"+ diferencia);
            Console.WriteLine($"{ Z:F20}");

        }
    }
}